David Zhang

Experience

• 

  Liaocheng Jinquan Construction Machinery Co.,Ltd

  Dec 2010 - now

  Senior Marketing Manager

  Our main products:Integral drill steel, Tapered rods & bits 32mm...Hex.22*108mm tapered rods 6, 7, 11, 12 degree...R32 & R35 thread button bits 45R32, 45R35, 48R32, 51R32...64, 76, 89T38 T45 button bits...102,115T45&T51 button bits...92, 102, 115, 127, 140GT60 button bits...R32/T38-102mm, 127mm pilot reaming bits...Coupling sleeve T38 190mm T45 225mm T51 245mm... Semi bridge, full bridge, adaptor Pin R38/BoxT38...Drifter rods R38 T38 Hex.35, Hex.32 rods, 3.7m,4.3m Speed rods...Bench and surface drilling rodsT38, T45,T51 extension rods 3.05m, MF rods 3.66m 4.2m 4.6m...GT60 extension rods,MF rods.3.66m & 4.265m...DTH drill pipes production technologies: Friction welding;DTH drill pipes out diameter:76mm, 89mm, 102mm, 114mm;DTH drill pipes thread sizes:2 3/8" API Reg, 2 7/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 2 3/8" API IF, 3 1/2" API IF;DTH drill pipes length: 1000mm, 1500mm, 2000mm, 30000mm, 6000mm.DTH hammers & DTH bitsCIR65, CIR80, CIR90, CIR110...BR2, BR3...Mach33...DHD3.5, DHD340, DHD350R, DHD360, DHD380, DHD1120...COP32, COP34, COP44, COP54, COP64, COP84...QL40, Q50, QL60, QL80, QL120...Mission40, Mission 50, Mission 60...SD4, SD5, SD6, SD8, SD10, SD12...Numa100, Numa120, Numa125...MC80...DTH ODEX casing systems, including concentric type & overburden type...RC hammer and bits...RE054,RE053...Tricone bits 6 3/4" 7 7/8" 9 7/8" 11 1/2", 12 3/4"... IADC412 512 522 532 622 632 722 732 822...7 7/8" 11 5/8" IADC537 tricone bits for water well drillingPilot tricone bits 11 5/8"....for raise boringRoll cutters 12", 14"self drilling anchor tools R32 T76...PDC anchor bitsCore bits BQ NQ PQ....Reamer shell Show less